CN110177314B

CN110177314B - Earphone and support

Info

Publication number: CN110177314B
Application number: CN201811177579.3A
Authority: CN
Inventors: 大川孝二; 武井政树; 植本将史; 浅香宏充; 氷室俊之
Original assignee: JVCKenwood Corp
Current assignee: JVCKenwood Corp
Priority date: 2018-02-20
Filing date: 2018-10-10
Publication date: 2020-10-16
Anticipated expiration: 2038-10-10
Also published as: JP2019145986A; JP2022120049A; CN110177314A; JP7151094B2; US20190261079A1; JP7447933B2

Abstract

The invention provides a headphone which can improve wearability regardless of the pinna shape. The earphone includes: a main body (31); and an arm portion (A345) that protrudes radially outward of the main body portion (31) and that can abut against and press the inner wall (65a) of the auricle (60) when the main body portion (31) is worn in the concha cavity (60D) of the auricle (60). The arm (A345) protruding from the body (31) has an easily deformable portion (A6) that is easily deformable compared to other portions.

Description

Earphone and support

Technical Field

The invention relates to an earphone and a support.

Background

In headphones, there are known: in order to improve the wearability to the pinna, an earphone is provided with a wearing aid portion that protrudes from the main body in an arm shape and presses against the inner wall of the pinna, and this example is described in patent document 1. In patent document 1, the wearing assistance portion corresponds to the locking portion. The wearing aid is also referred to as a cradle.

Prior art documents

Patent document

Patent document 1: japanese patent application laid-open No. 2002-058086.

Disclosure of Invention

Problems to be solved by the invention

The holder as the wearing aid portion is formed of silicone rubber or the like so as to have flexibility and provide a good wearing feeling.

However, the higher the flexibility of the holder, the more likely the holder is to be elastically deformed, and the smaller the pressing force to the inner wall of the pinna, the more difficult it is to improve the wearing performance of the earphone.

Further, the lower the flexibility of the holder, the more difficult it is to elastically deform, and the higher the pressing force to the inner wall of the pinna, the better the wearing performance of the earphone is, while the pinna may become painful with wearing.

Further, since the shape of the pinna varies among individuals, it is difficult to set the flexibility of the holder to be appropriate regardless of the pinna shape of the user, and some studies are desired to improve the wearability of the earphone to the pinna.

Accordingly, an object of the present invention is to provide a headphone and a holder that can improve wearability regardless of the shape of the pinna.

Means for solving the problems

In order to solve the above problem, the present invention has the following configuration.

1) An earphone, comprising: a main body portion; and an arm portion that protrudes outward in the radial direction of the main body portion, and that can abut against and press an inner wall of the pinna in a worn state in which the main body portion is worn in a concha cavity of the pinna, the arm portion having an easily deformable portion that is easily deformable compared to other portions.

2) A stand which can be freely assembled and disassembled relative to a main body part of an earphone,

the bracket includes an arm portion attached to the main body portion and capable of abutting against and pressing an inner wall of the pinna in a worn state in which the main body portion is worn in a concha cavity of the pinna,

the arm portion has an easily deformable portion that is easily deformable compared to other portions.

Effects of the invention

According to the present invention, the wearability can be improved regardless of the pinna shape.

Drawings

Fig. 1 is a perspective view showing a headphone a51 of example 1 of a headphone according to an embodiment of the present invention;

fig. 2 is an assembly view showing the assembly of the holder a1 of example 1, which is a holder according to the embodiment of the present invention, to the body portion 31 of the headphone a 51;

fig. 3 is a perspective view showing a bracket a 1;

fig. 4 is a perspective view for explaining a wearing state in which the earphone a51 is worn toward the pinna 60;

fig. 5 is a side view, partly in section, to explain the wearing state of fig. 4;

fig. 6 is a perspective view of a headphone B51 according to example 2 of a headphone according to an embodiment of the present invention;

fig. 7 is an assembly view showing a holder B1 of example 2 as a holder according to an embodiment of the present invention assembled to a main body portion 31 of a headphone B51;

fig. 8 is a perspective view showing a bracket B1;

fig. 9 is a perspective view for explaining a wearing state in which the earphone B51 is worn toward the auricle 60;

fig. 10 is a side view, in section, to be used for explaining a part of the wearing process of fig. 9;

fig. 11 is a perspective view showing a headphone C51 of example 3 of a headphone according to an embodiment of the present invention;

fig. 12 is an assembly diagram in which a holder C1 of example 3, which is a holder according to an embodiment of the present invention, is assembled to a main body portion 31 of an earphone C51;

fig. 13 is a perspective view showing a bracket C1;

fig. 14 is a perspective view for explaining a wearing state in which the earphone C51 is worn toward the pinna 60;

fig. 15 is a graph for explaining deformation resistance of the bracket a 1.

Detailed Description

Headphones according to an embodiment of the present invention will be described with reference to the headphones a51 to C51 in examples 1 to 3.

(example 1)

Fig. 1 is a perspective view showing an earphone a51 of embodiment 1. The earphone a51 is of the so-called earbud type (in-ear type), and is for the left ear.

The earphone a51 includes a substantially cylindrical body portion 31 in which the speaker unit 35 is housed, and an electric wire 33 having one end connected to the speaker unit 35 and pulled out from the body portion 31 via the bush 32.

A sound tube portion 31a is formed on one end side of the body portion 31, and the sound tube portion 31a projects obliquely toward the face side when the ear hook is worn with respect to the axis CL31 of the body portion 31.

An earpiece 34 inserted into the external auditory canal is detachably attached to the distal end of the acoustic tube portion 31 a.

IN the following description, for convenience, the side of the sound tube portion 31a protruding IN the direction of the axis CL31 is referred to as IN, and the opposite side thereof is referred to as OUT (see fig. 1).

The main body 31 is formed of a resin such as PC (polycarbonate), and the liner 32 and the earpiece 34 are formed of silicone rubber, for example.

The earphone a51 converts a voice signal, which is input from an external voice reproducing device or the like via the electric wire 33, into sound by the speaker unit 35, and emits the sound from the tip end of the sound tube portion 31a to the outside.

A holder a1 is detachably attached to a base portion of the sound tube 31a protruding from the body 31. The bracket a1 may be integral with the body portion 31, but is described here separately.

The holder a1 is attached to the main body 31 in a known detachable structure. Such as a strong fit, snap, plug, etc.

Next, details of the holder a1 will be described with reference to fig. 2 to 4.

Fig. 2 is an assembly view showing the assembly of the cradle a1 and the earpiece 34 with respect to the main body portion 31, fig. 3 is a perspective view of the cradle a1 alone, and fig. 4 is a view showing a use state in which the headphone a51 is worn in the pinna 60.

The holder a1 includes an annular base a2 detachably engaged with the body 31, and an arm a345 extending radially outward from the base a2 to the base a 2. The arm a345 has a root portion A3, an intermediate portion a4, and a tip portion a5 in this order from the root side.

Specifically, in a state where the holder a1 is attached to the main body 31, the arm portion a345 includes: a root portion a3 standing in the radial direction of the body 31; an intermediate portion a4 bent approximately 90 ° from the end of the base portion A3 facing outward toward the face side in use; and a tip portion a5 extending substantially straight from an outward end of the intermediate portion a 4.

The curvature of the intermediate portion a4 is set so that it follows the antihelix 66 of the pinna 60.

The holder a1 is formed of, for example, silicone rubber, and the arm a345 has flexibility and a soft surface.

The holder a1 has a groove portion a6, and the groove portion a6 is a groove cut in the arm portion a 345. The depth of the groove is, for example, about half the thickness of the arm portion a 345. As shown in fig. 2, the height of the opening is defined as an opening width Wa. The extending direction and the cutting direction of the groove a6 are orthogonal to the axis of the portion of the arm a345 where the groove a6 is provided in this example, but may be oblique. In the arm portion a345, the groove portion a6 is formed as an easily deformable portion that is easily deformed by bending, i.e., is deformed more largely than other portions with respect to the same bending deformation force.

In this example, two groove portions a6 are provided as the easily deformable portions. Specifically, the groove portion A6a is cut from the OUT side toward the IN side at the root portion A3, and the groove portion A6b is cut from the IN side toward the OUT side near the boundary position between the middle portion a4 and the tip portion a 5.

In this example, the groove a6 has a depth of about half the thickness of the arm a345 at the position of each groove a6, and an opening width Wa of about 1/8.

The groove a6 has a smaller cross-sectional area than other portions (non-groove portions), and is approximately half in this example. Therefore, the arm portion a345 is not a groove portion but mainly the groove portion a6 deforms and flexes at the time of flexing. Fig. 15 is a schematic graph showing the relationship between the deformation amount (horizontal axis) and the deformation resistance (vertical axis) when the portion of the groove portion a6 of the arm portion a345 is deflected so as to close the groove portion a 6.

As shown in the graph of fig. 15, the deformation resistance at the initial stage of deformation is small, and the deformation resistance gradually increases as the deformation amount increases, and the deformation resistance sharply increases when the deflection amount becomes the value P.

The range of the value P or more is a state where the opening of the groove portion a6 is closed and in contact therewith (the opening width Wa is 0), and in this case, when the depth of the groove portion a6 is half the thickness of the portion of the arm portion a345 near the groove portion a6 and the opening width Wa is about 1/8 of the thickness, the deformation angle is about 15 °.

In this way, by having the groove portions a6, the holder a1 is processed in two stages in terms of the degree of difficulty of deformation in the flexural deformation of the arm portions a345 as follows: in the initial stage of deformation, the groove portion a6 is deformed with a small force while being open, and therefore easily deformed, whereas after the groove portion a6 is closed, it is hardly deformed.

Thus, the groove portion A6a provided on the root portion A3 and opening toward the OUT side is processed in two stages when the intermediate portion a4 is deformed toward the OUT side with respect to the root portion A3.

On the other hand, the groove portion A6b, which is open to the IN side and provided IN the vicinity of the boundary between the intermediate portion a4 and the tip portion a5, is processed IN two stages when the tip portion a5 is deformed toward the IN side with respect to the intermediate portion a 4.

In view of this, the wearing of the earphone a51 to the pinna 60 is explained with reference to fig. 4 and 5. In fig. 4, the directions of the top, bottom, front, and rear are defined by arrows.

Fig. 4 shows a state in which the earphone a51 is worn toward the auricle 60 and a stable posture is achieved.

This state is hereinafter referred to as a wearing state.

When the earphone a51 is worn in the auricle 60, as shown in fig. 2, the holder a1 is engaged with the main body portion 31 in advance, and the earpiece 34 is fitted to the sound tube portion 31 a.

The headphone a51 assumes a posture in which the bush 32 and the wire 33 are pulled out downward through the intertragic notch 60E of the auricle 60 in the worn state.

The earpiece 34 is inserted into the external ear canal, not shown in fig. 4.

The base portion a2 of the bracket a1 is retracted into the concha cavity 60D of the auricle 60, the arm portion a345 is pressed from the concha cavity 60D beyond the crus of the helix 62 by the upper concha boat 60C and abuts against the inner wall 65a on the rear side of the inferior crus of the antihelix 65, and the tip portion a5 is retracted into the auricle 60 so as to press the inner wall 62a on the inner side of the crus of the helix 62 forward.

Fig. 5 is a side view (rear view) partially in section showing a state where the arm portion a345 is beyond the crus 62.

As shown IN fig. 5, when the main body 31 of the earphone a51 is pushed IN the IN direction with a hand for wearing, the base portion A3 to the intermediate portion a4 of the arm portion a345 are pushed toward the OUT side by the crus 62 and deformed (see arrow DRa).

However, when the amount of deformation increases to reach the P value in the groove portion A6a, the opening of the groove portion A6a, which is set to open to the OUT side, closes the contact as shown in fig. 5, and the deformation resistance sharply increases, hindering the deformation.

On the other hand, in fig. 4, the distal end portion a5 is retracted into the rear side wall of the crus of helix 62, and therefore, movement to the OUT side is restricted, and the intermediate portion a4 attempts to deform to the OUT side beyond the crus of helix 62.

When the amount of deformation increases to reach the P value IN the groove portion A6b, the groove portion A6b set to open to the IN side closes, the deformation resistance sharply increases, and deformation is hindered.

In this way, since the arm portions a345 are closed by the deformation amounts in the wearing lower groove portions A6a and A6b and are less likely to be elastically deformed, the body portion 31 can be firmly maintained in the wearing state without falling off from the pinna 60, and the wearing performance and the wearing feeling can be improved.

Since the grooves A6a and A6b are in a state of being substantially easily subjected to soft elastic deformation until reaching the P value, the arm portions a345 are fitted into the pinna so as to be suitable for various pinna shapes.

(example 2)

Fig. 6 is a perspective view showing an earphone B51 of embodiment 2. The headphone B51 is a so-called earplug type (in-ear type) for the left ear.

Headset B51 is a headset in which cradle a1 in headset a51 is replaced with cradle B1, and the rest is the same as headset a 51. Therefore, a holder B1 different from embodiment 1 will be described with reference to fig. 6 to 8.

OUT and IN are the same as those IN embodiment 1, and are defined as shown IN FIG. 6.

The bracket B1 has: an annular base portion B2 that is detachably engaged with the main body portion 31; an arm portion B345 extending radially outward from the base portion B2 to the base portion B2; the wall portion B7 extends in the circumferential direction at a circumferential position of the base portion B2 opposite to the position at which the arm portion B345 extends, and is formed so as to protrude radially outward of the base portion B2.

The arm B345 is a member obtained by removing the groove a6 from the holder a1, and includes a base B3, an intermediate portion B4, and a tip B5 in this order from the root side.

Specifically, in a state where the bracket B1 is attached to the main body 31, the arm portion B345 includes, from the base side: a root portion B3 extending radially outward from the main body portion 31; an intermediate portion B4 bent approximately 90 ° from the end portion of the base portion B3 facing outward toward the face side in use; and a tip portion B5 extending substantially linearly from an outward end of the intermediate portion B4.

The curvature of the intermediate portion B4 is set to follow the antihelix 66 of the pinna 60.

The stay B1 is formed of, for example, silicone rubber, and the arm B345 and the wall B7 are flexible and have a soft surface.

The bracket B1 has a groove B8 extending in the circumferential direction along the base B2 near the base of the wall B7. The groove portion B8 is formed as a portion that is more easily deformed than the other portions in the wall portion B7 (a portion that is deformed with the same bending deformation force).

The groove portion B8 is cut from the OUT side toward the IN side, has a depth of substantially 2/3 which is the thickness of the wall portion B7, and is formed along the circumferential direction of the base portion B2 over the entire width of the wall portion B7.

The deformation resistance when the wall portion B7 is deformed so as to fall down to the OUT side is handled in two stages of a low resistance until the opening is closed and a high resistance after the closing, as in the case of the groove portion a6 of example 1 shown in fig. 15.

In view of this, the wearing of the headphone B51 to the auricle 60 is explained with reference to fig. 9 and 10. Fig. 9 shows the respective directions of the upper, lower, front, and rear.

Fig. 9 shows a wearing state in which the earphone B51 is worn on the pinna 60 in a stable posture.

When the headphone B51 is worn in the auricle 60, as shown in fig. 7, the holder B1 is engaged with the main body portion 31 in advance, and the earpiece 34 is fitted to the sound tube portion 31 a. The bracket B1 is attached to the main body 31 in a known detachable structure, similarly to the bracket a 1.

The base portion B2 of the bracket B1 is retracted into the concha cavity 60D of the auricle 60, the arm portion B345 is pressed from the concha cavity 60D beyond the crus of the helix 62 by the upper concha boat 60C and abuts against the inner wall 65a on the rear side of the inferior crus of the antihelix 65, and the tip portion B5 is retracted so as to press the inner wall 62a on the inner side of the crus of the helix 62 forward.

On the other hand, wall portion B7 is drawn into concha cavity 60D inside auricle 60 beyond lower antitragus 67.

When the wall portion B7 passes over the antitragus 67, it is deformed so as to fall toward the OUT side as shown in fig. 10, but the opening of the groove portion B8 is closed, and the deformation resistance increases rapidly, so that elastic deformation is less likely to occur.

Therefore, the arm portion B345 is pushed upward and firmly presses the inner wall 65a (lower wall) of the antihelix crura 65, and a good accommodation position can be secured regardless of the pinna shape.

Further, even after the wall portion B7 has been retracted into the cavum concha 60D beyond the antitragus 67, it is pushed downward by the reaction force from the inner wall of the antihelix crura 65 applied to the arm portion B345, but since the groove portion B8 is closed, it is in a state in which it is difficult to elastically deform, and therefore, it is worn in a stable posture.

In this way, the headphone B51 has the wall portion B7 by the holder B1, and is suitable for various shapes of auricles to improve wearability.

(example 3)

Fig. 11 is a perspective view showing an earphone C51 of embodiment 3. The earphone C51 is of the so-called earbud type (in-ear type) for the left ear.

Headset C51 is a headset in which cradle a1 in headset a51 is replaced with cradle C1, and the rest is the same as headset a 51. Therefore, a holder C1 different from embodiment 1 will be described with reference to fig. 11 to 14.

OUT and IN are defined as shown IN fig. 11, similarly to embodiment 1.

The bracket C1 has: an annular base C2 detachably engaged with the main body 31; and an arm portion C345 extending radially outward from the base portion C2 toward the base portion C2. The arm portion C345 includes a root portion C3, an intermediate portion C4, and a tip portion C5 in this order from the root side.

Specifically, in a state where the bracket C1 is attached to the main body 31, the arm portion C345 includes: a root portion C3 extending radially outward from the main body portion 31; an intermediate portion C4 that is connected to the base portion C3 and gently curves toward the face side when in use; and a distal end portion C5 connected to the intermediate portion C4 and bent in an inverted U-shape so that the distal end side faces the main body portion 31.

The curvature of the tip portion C5 is set to follow the inner side wall of the helix 63 of the pinna 60.

The holder C1 is made of, for example, silicone rubber, and the arm C345 has flexibility and a soft surface.

The holder C1 has a groove C6, and the groove C6 is a groove cut into the arm C345. The groove portion C6 is formed as a portion that is more easily deformed than other portions in the arm portion C345 (a portion that is deformed with the same bending deformation force more largely).

The depth of the groove is, for example, about half the thickness of the arm portion C345. As shown in fig. 13, the width of the opening is defined as an opening width Wc. The extending direction and the cutting direction of the groove C6 are orthogonal to the axis of the portion of the arm C345 where the groove C6 is provided in this example, but may be oblique.

In this example, the groove C6 is provided at three positions. Specifically, the groove portions C6a, C6b, C6C are cut from the base C2 side toward the IN side, the groove portion C6a is cut from the OUT side toward the IN side at the base C3, the groove portion C6b is cut from the IN side toward the OUT side at the intermediate portion C4, and the groove portion C6C is cut from the OUT side toward the IN side.

In this example, the depth of the groove C6 is approximately half the thickness of the arm C345 in the vicinity of each groove C6, and the opening width Wc is approximately 1/8.

The deformation resistance when the groove portion C6 is deformed so as to fall down toward the opening side is treated in two stages of low resistance until the opening of the groove portion C6 is closed and high resistance after the closing, as in the groove portion a6 of example 1 shown in fig. 15.

In view of this, the wearing of the earphone C51 to the pinna 60 is explained mainly with reference to fig. 14. In fig. 14, the directions of the upper, lower, front, and rear are indicated by arrows. Fig. 14 shows a wearing state in which the earphone C51 is worn on the pinna 60 in a stable posture.

When the earphone C51 is worn in the auricle 60, as shown in fig. 12, the holder C1 is engaged with the main body portion 31 in advance, and the earpiece 34 is fitted to the sound tube portion 31 a.

The earphone C51 assumes a posture in which the hub 32 and the cord 33 are pulled out downward through the intertragic notch 60E of the auricle 60 in the worn state.

The earpiece 34 is inserted into the external ear canal, but is not shown in fig. 14.

The base C2 of the bracket C1 is retracted into the concha cavity 60D of the pinna 60, the arm C345 extends from the concha cavity 60D to the upper navicular fossa 60A beyond the crus 62 and the antihelix 66, and the tip C5 extends to the crus 62 along the inner wall 63a of the inner side of the helix 63 and is retracted into the pinna 60.

Here, the base portion C3 to the intermediate portion C4 of the arm portion C345 are pressed and deformed toward the OUT side by the crus 62.

Thus, the groove portion C6a is in a state in which the deformation amount reaches the P value, the opening is closed, the deformation resistance increases, and elastic deformation is hard to occur. On the other hand, the groove portion C6C is in the following state: since the distal end portion C5 is bent along the inner side wall of the helix 63 to reach the helix leg 62 and is stabilized, when the opening is closed by being deformed in the direction in which the opening is closed and the amount of deformation reaches the value P, the deformation resistance increases and elastic deformation is hard to occur.

Therefore, the arm portion C345 is in a state in which it is less likely to be elastically deformed by the amount of deformation when worn in the pinna 60, and can firmly hold the body portion 31 so as not to fall off from the pinna 60 in the worn state.

In addition, in the case where the difference in height between the navicular fossa 60A and the antihelix 66 of the arm portion C345 is small or the like due to individual differences in auricles 60, the groove portion C6C of the arm portion C345 restricts excessive deformation of the arm portion C345 in the direction in which the groove portion C6C is closed by the above two-stage process.

In this way, since the arm portions C345 are closed by the deformation amount groove portions C6a to C6C when worn, and are in a state in which elastic deformation is hard to occur, the body portion 31 can be firmly maintained so as not to fall off from the pinna 60 in the worn state, and the wearability and the wearing feeling can be improved.

Since the arm portions C345 are in a substantially soft state in which they are easily elastically deformed until the groove portions C6a to C6C reach the P value, they fit into the pinna in various pinna shapes.

The earphones a51 to C51 described above were described for the left ear, but may be reversed in the front-rear direction and symmetrical about the vertical axis for the right ear.

The above-described embodiments are not limited to the above-described configurations, and may be modified as modifications within a range not departing from the spirit of the present invention.

The brackets a1 to C1 may be formed integrally with the main body 31.

As in embodiments 1 to 3, by being able to replace the brackets a1 to C1, the brackets can be selected according to the use and preference of the user, thereby improving convenience.

The earphones A51-A53 are not limited to the in-ear type. The so-called inner ear type may be used by merely housing the main body 31 in the auricle 60 without providing the acoustic tube portion 31a and the earpiece 34.

The wall portion B7 of embodiment 2 can also be applied to embodiment 1 and embodiment 3.

The groove portions a6, B6, and C6 having a smaller cross-sectional area than the other portions are described as examples of the easily deformable portions, but the present invention is not limited thereto. For example, the portion may be formed of a material softer than other portions.

Description of the symbols

A1 support

Base A2, arm A345, base A3, and middle part A4

A5 tip part, A6, A6a and A6b groove parts

A51, B51, C51 earphone

B1 support

B2 base, B345 arm, B3 bases, B4 middle part

B5 front end, B345 arm, B7 wall, and B8 groove

C1 support

C2 base, C345 arm, C3 bases, C4 middle part

C5 apical part, C6, C6a, C6b and C6C groove part

CL31 axis

Opening width of Wa and Wc

31 main body part, 31a sound tube part

32 liner

33 electric wire

34 earphone

35 speaker unit

60 pinna

60A fossa navicularis, 60C concha boat and 60D concha cavity

60E interscreen notch

62 helix foot, 62a inner wall

63 helix, 63a inner wall

65 lower crus of antihelix, 65a inner wall

66 anthelix

67 antitragus

Claims

1. An earphone, comprising:

a main body portion; and

an arm portion that protrudes outward in a radial direction of the main body portion and that can abut against and press an inner wall of the pinna in a worn state in which the main body portion is worn in a concha cavity of the pinna,

the arm portion has a root base portion extending outward in a radial direction from the main body portion, an intermediate portion connected to the root base portion and curved in a direction toward a face when in use, and a tip portion connected to the intermediate portion and extending outward of the intermediate portion,

the arm portion has an easily deformable portion which is easily deformable compared with other portions in the arm portion, at the base portion and the intermediate portion,

the easily deformable portion is a groove portion having a cross-sectional area smaller than the other portions, and an opening width of the groove portion in the arm portion is smaller than a depth of the groove portion.

2. The headset of claim 1,

the groove portion includes a first groove portion that is located in the intermediate portion and is formed so as to open toward the head portion side in the worn state.

3. The headset of claim 1,

the groove portion includes a second groove portion that is located at the root portion and is formed so as to open to an opposite side to the head portion side in the worn state.

4. The headset of claim 1,

the groove portion includes a first groove portion located at the intermediate portion and formed to open toward the head portion side in the worn state, and a second groove portion located at the root portion and formed to open toward the opposite side of the head portion side in the worn state.

5. A stand which can be freely assembled and disassembled relative to a main body part of an earphone,

the bracket includes an arm portion attached to the main body portion, the arm portion being capable of abutting against and pressing an inner wall of the pinna in a worn state in which the main body portion is worn in a concha cavity of the pinna,

the easily deformable portion is a groove portion having a cross-sectional area smaller than that of the other portion, and an opening width of the groove portion in the arm portion is smaller than a depth of the groove portion.

6. The cradle of claim 5,

7. The cradle of claim 5,

8. The cradle of claim 5,